actual fix on error (#1564)

Author: lnhsingh

src/oss/langchain/context-engineering.mdx

@@ -1278,7 +1278,6 @@ const customerSupportTicket = z.object({
 ```
 :::
 
-:::python
 #### Selecting formats
 
 Dynamic response format selection adapts schemas based on user preferences, conversation stage, or role—returning simple formats early and detailed formats as complexity increases.
@@ -1567,7 +1566,6 @@ Dynamic response format selection adapts schemas based on user preferences, conv
     :::
   </Tab>
 </Tabs>
-:::
 
 ## Tool Context